void YourClassName::askCode() {
    State = REQUESTCODE; //I have a state variable
    QNetworkRequest request = QNetworkRequest(); //create a new request
    request.setUrl(QUrl("https://getpocket.com/v3/oauth/request?"));
    QString jsonParam;
    jsonParam.append(
    "{\"consumer_key\":\"YOURCONSUMERKEYHERE\",\"redirect_uri\":\"YOURREDIRECTURIHERE"}");
    request.setHeader(
    QNetworkRequest::ContentTypeHeader, "Content-Type: application/json; charset=UTF-8");
    request.setRawHeader("X-Accept:","application/json"); //X-Accept: application/json
    mNetworkAccessManager->post(request, jsonParam.toUtf8());
}